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maxwell_3d: Fix depth clamping register

Browse source 
Using deko3d as reference:
4e47ba0013/source/maxwell/gpu_3d_state.cpp (L42)

We were using bits 3 and 4 to determine depth clamping, but these are
the same both enabled and disabled:

state->depthClampEnable ? 0x101A : 0x181D

The same happens on Nvidia's OpenGL driver, where they do something like
this (default capabilities, GL 4.5 compatibility):

(state & DEPTH_CLAMP) != 0 ? 0x201a : 0x281c

There's always a difference between the first bits in this register, but
bit 11 is consistently disabled on both deko3d/NVN and OpenGL. This
commit changes yuzu's behaviour to use bit 11 to determine depth
clamping.

- Fixes depth issues on Super Mario Odyssey's intro.
This commit is contained in:
ReinUsesLisp 2020-04-27 20:50:14 -03:00
parent 1517cba8ca
commit bb1ed66d99
5 changed files with 5 additions and 8 deletions
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1
src/video_core/engines/maxwell_3d.h
View file

@ -1179,6 +1179,7 @@ public:
BitField<0, 1, u32> depth_range_0_1;
BitField<3, 1, u32> depth_clamp_near;
BitField<4, 1, u32> depth_clamp_far;
BitField<11, 1, u32> depth_clamp_disabled;
} view_volume_clip_control;
INSERT_UNION_PADDING_WORDS(0x1F);

6
src/video_core/renderer_opengl/gl_rasterizer.cpp
View file

@ -999,11 +999,7 @@ void RasterizerOpenGL::SyncDepthClamp() {
}
flags[Dirty::DepthClampEnabled] = false;
const auto& state = gpu.regs.view_volume_clip_control;
UNIMPLEMENTED_IF_MSG(state.depth_clamp_far != state.depth_clamp_near,
"Unimplemented depth clamp separation!");
oglEnable(GL_DEPTH_CLAMP, state.depth_clamp_far || state.depth_clamp_near);
oglEnable(GL_DEPTH_CLAMP, gpu.regs.view_volume_clip_control.depth_clamp_disabled == 0);
}
void RasterizerOpenGL::SyncClipEnabled(u32 clip_mask) {

2
src/video_core/renderer_vulkan/fixed_pipeline_state.cpp
View file

@ -81,7 +81,7 @@ void FixedPipelineState::Rasterizer::Fill(const Maxwell& regs) noexcept {
primitive_restart_enable.Assign(regs.primitive_restart.enabled != 0 ? 1 : 0);
cull_enable.Assign(regs.cull_test_enabled != 0 ? 1 : 0);
depth_bias_enable.Assign(enabled_lut[POLYGON_OFFSET_ENABLE_LUT[topology_index]] != 0 ? 1 : 0);
depth_clamp_enable.Assign(clip.depth_clamp_near == 1 || clip.depth_clamp_far == 1 ? 1 : 0);
depth_clamp_disabled.Assign(regs.view_volume_clip_control.depth_clamp_disabled.Value());
ndc_minus_one_to_one.Assign(regs.depth_mode == Maxwell::DepthMode::MinusOneToOne ? 1 : 0);
cull_face.Assign(PackCullFace(regs.cull_face));
front_face.Assign(packed_front_face);

2
src/video_core/renderer_vulkan/fixed_pipeline_state.h
View file

@ -153,7 +153,7 @@ struct FixedPipelineState {
BitField<4, 1, u32> primitive_restart_enable;
BitField<5, 1, u32> cull_enable;
BitField<6, 1, u32> depth_bias_enable;
BitField<7, 1, u32> depth_clamp_enable;
BitField<7, 1, u32> depth_clamp_disabled;
BitField<8, 1, u32> ndc_minus_one_to_one;
BitField<9, 2, u32> cull_face;
BitField<11, 1, u32> front_face;

2
src/video_core/renderer_vulkan/vk_graphics_pipeline.cpp
View file

@ -249,7 +249,7 @@ vk::Pipeline VKGraphicsPipeline::CreatePipeline(const RenderPassParams& renderpa
rasterization_ci.sType = VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_CREATE_INFO;
rasterization_ci.pNext = nullptr;
rasterization_ci.flags = 0;
rasterization_ci.depthClampEnable = rs.depth_clamp_enable;
rasterization_ci.depthClampEnable = rs.depth_clamp_disabled == 0 ? VK_TRUE : VK_FALSE;
rasterization_ci.rasterizerDiscardEnable = VK_FALSE;
rasterization_ci.polygonMode = VK_POLYGON_MODE_FILL;
rasterization_ci.cullMode =